diff -Nuar a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt	2017-12-08 04:02:01.000000000 +0300
+++ b/CMakeLists.txt	2017-12-16 19:06:49.046309936 +0300
@@ -30,7 +30,7 @@
 set(KMIMELIB_VERSION "5.7.0")
 set(AKONADI_VERSION "5.7.0")
 
-set(QT_REQUIRED_VERSION "5.8.0")
+set(QT_REQUIRED_VERSION "5.7.1")
 find_package(Qt5 ${QT_REQUIRED_VERSION} CONFIG REQUIRED Widgets Test)
 ########### Find packages ###########
 find_package(KF5KIO ${KF5_VERSION} CONFIG REQUIRED)
